Machine for sharpening horseshoes.



Patented June 5, [900.

0. MARTIN.

MACHINE FOR SHABPENING HORSESHOES.

(Apglication filed Rab. 7, 1800.)

,(No Model.)

W WWSS $3 no. WASNINGTON a c UNITED STATE PATENT @FFICE.

DAVID' MARTIN, OF ALLEGHENY, PENNSYLVANIA.

MACHINE FOR SHARP ENING HORSESHOES.

SPECIFICATION forming part of Letters Patent No. 650,978, dated- June 5, 1900.

Application filed February 7, 1900. erial No. 4,397. (No model.)

To all whom it may concern.-

Be it known that I, DAVID MARTIN, a citizen of the United States of America, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Sharpening Horseshoes; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of thisspecification.

My invention relates to an improved machine or apparatus for sharpeninghorseshoes; and it' consists in the certain details of construction and combination of parts,- as will be fully described hereinafter.

The object of my invention is to provide a portable apparatus or machine by means of which the shoes of horses may be sharpened without. removing the same from the foot.

In the accompanying drawings, Figure 1 is a side elevation of my improved machine for sharpening horseshoes, which is constructed and arranged in accordance with my invention. Fig. 2 is a plan view of the same, having the hand-wheel and power-sprocket removed therefrom.

To construct a machine in accordance with my invention, I provide a suitable base 1 and mount thereon a frame 2, capable of being revolved about a pivot 3. Mounted at the top of this frame 2 in suitable bearings 4 is a shaft 4, to one end of which are attached a hand-wheel 5 and connected sprocket 6, together with a handle and crank-lever 5, by means of which a rapid rotary movement may be given to the said hand-wheel 5, sprocket 6, and shaft 4. Connected to this sprocket 6 by means of a chain belt 7 is a sprocketpinion 9, mounted upon a shaft 8, arranged some distance beneath the drive-shaft 4 and suspended by a frame 11 in a manner that will permit the said shaft to swing or oscillate within the limits of a radial slot 8', formed in the frame 1. The swinging frame 11 above mentioned is mounted upon the drive-shaft at and is made in the form of the letter L, and the shaft 8, mounted therein, is provided with a fly-wheel and a large bevel-gear 14, which is in mesh with a small pinion -15, mounted upon the one end of a shaft 16,

which has a bearing 12 in the forward end of the swinging frame 11. This shaft 16 is incased within a tube 13 and is several feet in length and projects some distance away from the machine. Arranged upon the outer extremity of the shaft 16 are a bearing 17 and small pinion 18, and the said bearing is provided with an integral support 17, adapted to form a bearing for a shaft 22, arranged at right angles to the tube 13. This last-mentioned shaft 22 is fitted with a bevel-pinion 19 in mesh with the pinion 18 previously mentioned and is also fitted with an emery or grinding wheel 21 of a suitable size and form. Attached to and forming a part of the bearing 17 17 is a handle-bar 20, which will enable the operator to turn the apparatus about its pivotal point 3 to elevate or lower the grinding-wheel 21 and to move the same about the arc of a circle. A leg or rest 23 is attached to the tube 13, which will serve to keep the grinding-wheel 21 upon the same plane as the shaft 8, to which it is geared.

In operation hand-power is applied to the lever 5, which by means of the sprocket 6, its chain 7, and pinion 9 gives the shaft 8 a rapid rotary movement. This movement of the shaft 8 transmits a rapid movement to the large bevel-gear 14, and it, meshing with the small pinion 15,gives the shaft 16 an increased rotation, which is communicated through the pinions 18 19 to the grinding-wheel 21, thereby rotating the same at several hundred revolutions per minute. The operator now applies the grinding-wheel 21 to the calks of the horseshoe, rapidly grinding the same to a sharpened or chisel edge in a manner and for the purpose Well known in the art.

By means of the handle-bar 20 the grinding-wheel 21 may be rotated about the shaft 16, and by means of the swinging frame 11 and pivotal connection 3 of the frame 1 the said wheel may be moved and adjusted to any position necessary to grind or sharpen the calks of the horseshoe without removing the same from the foot.

This machine or apparatus may be used for other purposes, such as a portable grinding or polishing machine.

Various slight modifications and changes or alterations may be made in the details of construction without departing from the spirit of the invention. Therefore I do not confine myself to the exact construction shown and described.

Having thus described my invention, I elaim- 1. 'lheherein-described machine forsharpeniug horseshoes, consisting of the frame 2, mounted upon a pivot 3, the d rive-shaft 4, pro vided with a hand-wheel 5, and crank 5, a

sprocket-wheel 6 mounted upon the said shaft the combination of a rotatable frame provided with radial slots, a substantially L-shaped swinging frame suspended within the rotatable frame, an operating-shaft journaled in the swinging frame and extending through the radial slots in the rotatable frame to limit the movement of the swinging frame, means carried by the rotatable frame for operating said shaft, a suitably-supported grindingwheel, and gearing connections between said wheel and the operating-shaft for rotating said wheel when the shaft is operated, as and for the purpose set forth.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

DAVID MARTIN.

\Vitnesses:

JouN GROE'IZINUER, S. It. Lnvrs. 

